Fuse Mounting Accessories Page 105 Fuse & Mounting Accessories

2017 Littelfuse, Inc. Specifications are subject to change without notice. Revised: 03/03/17 Surface Mount Fuses NANO 2 > 160 Fuse and Clip Series Average Time Current Curves Reflow Condition Pb-free assembly Pre Heat - Temperature Min (T s(min) ) 150C - Temperature Max (T s(max) ) 200C - Time (Min to Max) (t s ) 60 - 180 seconds Average Ramp-up Rate (Liquidus Temp (T L ) to peak) 5C/second max. T S(max) to T L - Ramp-up Rate 5C/second max. Reflow - Temperature (T L ) (Liquidus) 217C - Temperature (t L ) 60 - 150 seconds Peak Temperature (T P ) 260 +0/-5 C Time within 5C of actual peak Temperature (t p ) 20 - 40 seconds Ramp-down Rate 5C/second max. Time 25C to peak Temperature (T P ) 8 minutes max. Do not exceed 260C Soldering Parameters Temperature Re-rating Curve 0.001 0.01 0.1 1 10 100 0.1 1 10 100 1000 TIME IN SECONDS CURRENT IN AMPS 5A 4A 2A 1.5A 1A .750A .500A 3.5A 3A 2.5A Time Temperature T P T L T S min 25 t S t 25C to Peak t L t P Preheat T S max Ramp-down Ramp-up Critical Zone T L to T P Note: 1. Rerating depicted in this curve is in addition to the standard derating of 25% for continuous operation.

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